From 3756588858acfe0f3f64c2fd47f5ff3a58728592 Mon Sep 17 00:00:00 2001
From: uwetews <uwe.tews@googlemail.com>
Date: Thu, 11 Feb 2016 22:05:45 +0100
Subject: [PATCH] - improvement added KnockoutJS comments to trimwhitespace
 outputfilter https://github.com/smarty-php/smarty/issues/82    
 https://github.com/smarty-php/smarty/pull/181

---
 change_log.txt                               | 4 ++++
 libs/plugins/outputfilter.trimwhitespace.php | 4 ++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/change_log.txt b/change_log.txt
index 95a5b4ff..e65b5830 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,4 +1,8 @@
  ===== 3.1.30-dev ===== (xx.xx.xx)
+ 11.02.2016
+  - improvement added KnockoutJS comments to trimwhitespace outputfilter https://github.com/smarty-php/smarty/issues/82 
+    https://github.com/smarty-php/smarty/pull/181
+    
  10.02.2016
   - bugfix {strip} must keep space on output creating smarty tags within html tags https://github.com/smarty-php/smarty/issues/177
   - bugfix wrong precedence on special if conditions like '$foo is ... by $bar' could cause wrong code https://github.com/smarty-php/smarty/issues/178
diff --git a/libs/plugins/outputfilter.trimwhitespace.php b/libs/plugins/outputfilter.trimwhitespace.php
index 79b48528..1a67123a 100644
--- a/libs/plugins/outputfilter.trimwhitespace.php
+++ b/libs/plugins/outputfilter.trimwhitespace.php
@@ -26,8 +26,8 @@ function smarty_outputfilter_trimwhitespace($source)
     // Unify Line-Breaks to \n
     $source = preg_replace("/\015\012|\015|\012/", "\n", $source);
 
-    // capture Internet Explorer Conditional Comments
-    if (preg_match_all('#<!--\[[^\]]+\]>.*?<!\[[^\]]+\]-->#is', $source, $matches,
+    // capture Internet Explorer and KnockoutJS Conditional Comments
+    if (preg_match_all('#<!--((\[[^\]]+\]>.*?<!\[[^\]]+\])|(\s*/?ko\s+.+))-->#is', $source, $matches,
                        PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
         foreach ($matches as $match) {
             $store[] = $match[ 0 ][ 0 ];